Тази книга отначало докрай е измислена от автора. Използвани са някои автентични материали както от практиката на автора, бивш следовател и адвокат, така и от практиката на други руски юристи. Но събитията, мястото на действие и героите са измислени. Съвпаденията с имената и названията на реално съществуващи лица и места могат да бъдат само случайни.
Friedrich Neznansky (Russian: Фридрих Евсеевич Незнанский; born September 27, 1932 in Rahachow Raion, Belarus) was a popular Russian crime novelist. He was a lawyer by education, practiced law in Moscow, and was an investigator at the Moscow Prosecutor General’s office for fifteen years; his hero in most of his books, Aleksandr Turetsky, reflects that experience. Turetsky is a flawed hero—he has a straying eye. However, he always catches the crooks. Although Neznansky’s crime novels are light fiction, the political and social currents of the day can be sensed in them, as well as everyday Russian realities. Several of his books have been televised.